It's UTF-8

Fix some comments to "UTF-8".

Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: Adrian Bunk <bunk@stusta.de>
diff --git a/fs/fat/inode.c b/fs/fat/inode.c
index e7f4aa7..e78d7b4 100644
--- a/fs/fat/inode.c
+++ b/fs/fat/inode.c
@@ -1101,7 +1101,7 @@
 			return -EINVAL;
 		}
 	}
-	/* UTF8 doesn't provide FAT semantics */
+	/* UTF-8 doesn't provide FAT semantics */
 	if (!strcmp(opts->iocharset, "utf8")) {
 		printk(KERN_ERR "FAT: utf8 is not a recommended IO charset"
 		       " for FAT filesystems, filesystem will be case sensitive!\n");